US4237182A - Method of sealing interior mine surface with a fire retardant hydrophilic polyurethane foam and resulting product - Google Patents

Method of sealing interior mine surface with a fire retardant hydrophilic polyurethane foam and resulting product Download PDF

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Publication number
US4237182A
US4237182A US06/956,812 US95681278A US4237182A US 4237182 A US4237182 A US 4237182A US 95681278 A US95681278 A US 95681278A US 4237182 A US4237182 A US 4237182A
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United States
Prior art keywords
fire
prepolymer
parts
retarding
mine
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US06/956,812
Inventor
Glenn E. Fulmer
Robert M. Murch
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Chemical Bank
Hampshire Chemical Corp
Original Assignee
W R Grace and Co
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Priority to US06/956,812 priority Critical patent/US4237182A/en
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Publication of US4237182A publication Critical patent/US4237182A/en
Assigned to W.R. GRACE & CO.-CONN. reassignment W.R. GRACE & CO.-CONN. MERGER (SEE DOCUMENT FOR DETAILS). EFFECTIVE DATE: MAY 25, 1988 CONNECTICUT Assignors: GRACE MERGER CORP., A CORP. OF CONN. (CHANGED TO), W.R. GRACE & CO., A CORP. OF CONN. (MERGED INTO)
Assigned to CHASE MANHATTAN BANK (NATIONAL ASSOCIATION), AS COLLATERAL AGENT, THE reassignment CHASE MANHATTAN BANK (NATIONAL ASSOCIATION), AS COLLATERAL AGENT, THE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HAMPSHIRE CHEMICAL CORP.
Assigned to HAMPSHIRE CHEMICAL CORP. reassignment HAMPSHIRE CHEMICAL CORP. ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: W.R. GRACE & CO.-CONN.
Assigned to HAMPSHIRE CHEMICAL CORPORATION reassignment HAMPSHIRE CHEMICAL CORPORATION PATENT RELEASE Assignors: CHASE MANHATTAN BANK, THE
Assigned to CHEMICAL BANK reassignment CHEMICAL BANK ASSIGNMENT FOR SECURITY Assignors: HAMPSHIRE CHEMICAL CORPORATION
Assigned to HAMPSHIRE CHEMICAL CORP. reassignment HAMPSHIRE CHEMICAL CORP. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHASE MANHATTAN BANK, THE
Anticipated expiration legal-status Critical
Application status is Expired - Lifetime legal-status Critical

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